JP2867506B2 - Switching business group service control method - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a business group service control method for an exchange.

[Conventional technology]

The group of subscribers receiving the Centrex service as a group, that is, the service provided to the business group is called a business group service,
For example, an extension connection service for connecting subscribers with a predetermined extension number, an external call call waiting used for a call from outside the group, an extension call waiting used when both calling and called subscribers are in the same group,
There are caller call waiting controlled by the caller side, intra-group call transfer within a group, external call transfer used for calls from outside the group, and the like. Conventionally, the connection is applied only within the same station.

In order to perform these business group services, a predetermined number is determined for each service and registered in a database (not shown) of the exchange corresponding to the subscriber information.
When the predetermined number is received and identified by the central processing unit (not shown) of the exchange, the central processing unit refers to the database and controls to provide the corresponding business group service.

[Problems to be solved by the invention]

In the conventional business group service control described above,
The business group service is allowed only for subscribers in the same station, and between subscribers accommodated in different stations, it is not possible to know call information such as the extension number of the other party at the time of call generation, Further, since the service information of the caller cannot be transmitted, the business group service cannot be applied. With the expansion of communication networks, it has been desired to expand the application range of this business group service.

An object of the present invention is to provide a business group service of an exchange which allows a business group to be formed between a plurality of stations located at a large distance from each other, and which can provide a business group service to telephones accommodated in these different stations. It is to provide a control method.

[Means for solving the problem]

The business group service control system of the switch of the present invention is a switch that conforms to the common line signaling system No. 7 on the calling side
No.7IS common channel signaling system that controls circuit-switched calls in the same procedure
Business group service identification information for recognizing the type of business group service, which is a subscriber service provided to a business group in which subscribers receiving the Centrex service are grouped, is set in the address signal of the DN user part. The transmission is performed via a signal link different from the telephone line, and the exchange on the receiving side receives and identifies the business group service identification information and executes the business group service registered in advance for the corresponding subscriber. .

In the case of a wide-area business group that forms one business group among a plurality of stations, the business group service identification information includes wide-area business group number information for recognizing the wide-area business group, and membership in the wide-area business group. Extension number information and service request type information indicating the type of business group service registered in advance for this subscriber.

〔Example〕

Next, embodiments of the present invention will be described with reference to the drawings.

Referring to FIG. 1 (a) for explaining one embodiment of the present invention, a telephone H and a telephone I are accommodated in an exchange A, and a telephone J is accommodated in an exchange C. The exchange A can communicate with the exchange C by the relay exchange B. This communication uses the common channel signaling system No.7 Integrated Services Di
A signaling link F and a signaling link G passing through a digital network (ISDN) user unit are used. In addition, each telephone H, I,
The attributes assigned to J are shown in FIG. 1 (b). For example, in the telephone H, the wide area business group number “100” designated for both exchanges A and C, the local business group number “21” in exchange A, the extension number “210” in the group, and the outside line telephone in exchange A The attributes “No. 3-436-2341” and the type of subscriber “General” are assigned. FIG. 1 (c) is a diagram showing an example of a service access number of the business service group "021" in the exchange A of FIG. 1 (a). For dial call waiting and external line access services, FIG.
This indicates that “65” and “9” are used, respectively.

FIG. 2 is a diagram showing the transmission order of signals and tones when telephone H in FIG. 1 (a) requests extension connection of telephone J with a dial call waiting service, and FIG. 3 is transmitted in FIG. FIG. 4 is a diagram showing the content information of the IAM message, FIG. 4 is a diagram showing the business group service translator of the exchange A in FIG.
The figure shows a translator for exchanging a local office business group number with a wide area business group number or for exchanging a wide area business group number with a local office business group number. The operation will be described below with reference to FIGS. In the exchanges A and C, predetermined information is registered in advance in correspondence with subscriber information in order to perform a business group service in a database (not shown).

When the subscriber goes off-hook on the telephone H and hears the dial tone and dials "65", the exchange A uses the translator shown in FIG. 4 to obtain the next table address from the local business group number "21" in the business group number expansion table. The read and the first and second digit expansion tables recognize that "65" is a dial call waiting request. Thereafter, the subscriber hears the dial tone again and dials the extension number "212" of the other party. When the exchange A uses the spread table of the first to third digits of the translator of FIG. Number `` 42121
6645 "is a call to the telephone J of another station.
Therefore, the exchange A is provided with the Initial Address Message shown in FIG.
e (IAM) -1 message is transmitted to the intermediate exchange B. In the IAM message information, as shown in FIG. 3, a wide area business group number, a called party extension number, and an identifier which is a call for a dial call waiting service are set in the option part of this signal. Transit exchange B receiving IAM-1 selects a line from exchange telephone number to exchange C, and sends IAM-2 to exchange C. Here, when exchange C does not need all of the called party telephone numbers received from exchange A, for example, if a direct line is selected, IAM-1 and IAM-2 will be different. . When the IAM-2 is received, the exchange C sends an acknowledgment signal Address Complete Message (ACM) to the exchange A, and, from the wide area business group number "100" of the option part of the IAM-2, as shown in FIG. Referring to the own station business number table, find the own station business number “35”. The exchange C has the extension number "212"
Identifies that the incoming telephone is telephone J.
It also recognizes that there is dial call waiting as a service. Then, the response of the telephone J is detected,
A response signal Answer Message (ANM) is sent to the exchange A via the transit exchange B to set a communication path.

As described above, the exchange C can identify a business group call and a service request even for an incoming call from another station, and the same business group can be formed between the exchange A and the exchange C.

〔The invention's effect〕

As described above, according to the present invention, when a call is generated, the wide area business group number information used between stations using the address signal of the common channel signaling system No. 7 ISDN user section, and the extension number information of the subscriber in the wide area business group When,
Since the configuration is such that the business group identification information including the service request type information of the subscriber is set and transmitted to the receiving station, it is possible to configure a business group between a plurality of stations that are far apart from each other. Various business group services can be provided to telephones accommodated in the office.

[Brief description of the drawings]

FIG. 1 (a) is a diagram for explaining an embodiment of the present invention,
FIG. 1 (b) shows the attributes of telephones H, I, J in FIG. 1 (a), and FIG. 1 (c) shows the business service group "021" in exchange A in FIG. 1 (a). FIG. 2 is a diagram showing an example of a service access number, FIG. 2 is a diagram showing the transmission order of signals and tones when the telephone H in FIG. 1 (a) requests an extension connection of the telephone J with the dial call waiting service, and FIG. The figure shows the IAM sent in Fig. 2.
FIG. 4 shows the translator for the business group service of the exchange A in FIG. 1, and FIG. 5 shows the exchange of the local business group number to the wide area business group number or the wide area business FIG. 4 is a diagram illustrating a translator for exchanging a group number with a local business group number. A, C …… exchange, B …… transit exchange, D, E …… call line,
F, G …… Signal link, H, I, J …… Telephone.

Claims (2)

(57) [Claims] An exchange conforming to the common channel signaling system No. 7 on the originating side receives a Centrex service to an address signal of a common channel signaling system No. 7 ISDN user part which controls a circuit switched call in the same procedure. Business group service identification information for recognizing the type of business group service, which is a subscriber service provided to the business group in which the subscribers are grouped, is transmitted via a signal link different from the telephone line, and is transmitted to the receiving side. Wherein the exchange receives and identifies the business group service identification information and executes a business group service registered in advance for a corresponding subscriber. 2. The business group service identification information includes, in the case of a wide area business group forming one business group among a plurality of stations, wide area business group number information for recognizing the wide area business group;
2. A business group service for an exchange according to claim 1, comprising extension number information of a subscriber in the wide area business group and service request type information indicating a type of a business group service registered in advance for the subscriber. control method.